Also, are you counting from initial application or completed application?
A process could be:
Application received (incompleteness), starts to go through process
Notice of incomplete application issued day 10, Reg B clock stops
Needed information provided day 25 from initial ap, ap is now complete -financial institution has 30 days to make decision and notify customer.
Final decision made day 15 from completed ap, which is 40 days from initial ap.